RSpincalc (version 1.0.2)

EV2Q: Convert from Euler Vectors to rotation Quaternions

Description

EV2Q converts from Euler Vectors (EV) to Quaternions (Q).

Usage

EV2Q(EV, tol = 10 * .Machine$double.eps, ichk = FALSE, ignoreAllChk = FALSE)

Arguments

EV

Euler Vectors (EV) vector [m1, m2, m3, MU].

tol

Tolerance from deviations from unity for the determinant of rotation matrices or the the vector length for unitary vectors.

ichk

Logical, FALSE=disables near-singularity warnings.

ignoreAllChk

Logical, TRUE=disables all warnings and error checks (use with caution!).

Value

Quaternions (Q) vector [q1, q2, q3, q4].

References

by John Fuller, 14 Jul 2008 SpinCalc, Function to Convert between DCM, Euler angles, Quaternions, and Euler vectors. http://www.mathworks.com/matlabcentral/fileexchange/20696-function-to-convert-between-dcm--euler-angles--quaternions--and-euler-vectors

Paolo de Leva, 01 May 2013 SpinConv, Conversion from a rotation representation type to another. http://www.mathworks.com/matlabcentral/fileexchange/41562-spinconv

See Also

Q2EV

Examples

EV <- c(-0.1995301, -0.8765382, -0.4380279, 114.4324 * (pi/180))
EV2Q(EV,1e-7)
#EV2Q(EV)